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AUSCERT External Security Bulletin Redistribution
ESB-2015.2442
sol17263: OpenSSH vulnerabilities CVE-2015-6563 and CVE-2015-6564
17 September 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Access Confidential Data -- Existing Account
Increased Privileges -- Existing Account
Provide Misleading Information -- Existing Account
Resolution: Mitigation
CVE Names: CVE-2015-6564 CVE-2015-6563
Reference: ASB-2015.0090
Original Bulletin:
https://support.f5.com/kb/en-us/solutions/public/17000/200/sol17263.html
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sol17263: OpenSSH vulnerabilities CVE-2015-6563 and CVE-2015-6564
Security Advisory
Original Publication Date: 09/16/2015
Description
CVE-2015-6563
The monitor component in sshd in OpenSSH before 7.0 on non-OpenBSD platforms
accepts extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests,
which allows local users to conduct impersonation attacks by leveraging
any SSH login access in conjunction with control of the sshd uid to send
a crafted MONITOR_REQ_PWNAM request, related to monitor.c and monitor_wrap.c.
CVE-2015-6564
Use-after-free vulnerability in the mm_answer_pam_free_ctx function in
monitor.c in sshd in OpenSSH before 7.0 on non-OpenBSD platforms might
allow local users to gain privileges by leveraging control of the sshd
uid to send an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request.
Impact
A locally authenticated user can employ a highly complex exploit to conduct
impersonation attacks by using an OpenSSH flaw.
Status
F5 Product Development has assigned IDs 545429 and 545430 (BIG-IP), ID 545725
(Enterprise Manager), ID 545723 (BIG-IQ), and INSTALLER-1794 (Traffix SDC)
to this vulnerability, and has evaluated the currently supported releases
for potential vulnerability.
To determine if your release is known to be vulnerable, the components
or features that are affected by the vulnerability, and for information
about releases or hotfixes that address the vulnerability, refer to the
following table:
Product Versions known to be vulnerable Versions known to be not vulnerable Severity Vulnerable component or feature
BIG-IP LTM 12.0.0 None Low OpenSSH
11.0.0 - 11.6.0
10.1.0 - 10.2.4
BIG-IP AAM 12.0.0 None Low OpenSSH
11.4.0 - 11.6.0
BIG-IP AFM 12.0.0 None Low OpenSSH
11.3.0 - 11.6.0
BIG-IP 12.0.0 None Low OpenSSH
Analytics 11.0.0 - 11.6.0
BIG-IP APM 12.0.0 None Low OpenSSH
11.0.0 - 11.6.0
10.1.0 - 10.2.4
BIG-IP ASM 12.0.0 None Low OpenSSH
11.0.0 - 11.6.0
10.1.0 - 10.2.4
BIG-IP DNS 12.0.0 None Low OpenSSH
BIG-IP Edge 11.0.0 - 11.3.0 None Low OpenSSH
Gateway 10.1.0 - 10.2.4
BIG-IP GTM 11.0.0 - 11.6.0 None Low OpenSSH
10.1.0 - 10.2.4
BIG-IP Link 12.0.0 None Low OpenSSH
Controller 11.0.0 - 11.6.0
10.1.0 - 10.2.4
BIG-IP PEM 12.0.0 None Low OpenSSH
11.3.0 - 11.6.0
BIG-IP PSM 11.0.0 - 11.4.1 None Low OpenSSH
10.1.0 - 10.2.4
BIG-IP 11.0.0 - 11.3.0 None Low OpenSSH
WebAccelerator 10.1.0 - 10.2.4
BIG-IP WOM 11.0.0 - 11.3.0 None Low OpenSSH
10.1.0 - 10.2.4
ARX None 6.0.0 - 6.4.0 Not vulnerable None
Enterprise 3.0.0 - 3.1.1 None Low OpenSSH
Manager
FirePass None 7.0.0 Not vulnerable None
6.0.0 - 6.1.0
BIG-IQ Cloud 4.0.0 - 4.5.0 None Low OpenSSH
BIG-IQ Device 4.2.0 - 4.5.0 None Low OpenSSH
BIG-IQ Security 4.0.0 - 4.5.0 None Low OpenSSH
BIG-IQ ADC 4.5.0 None Low OpenSSH
LineRate None 2.5.0 - 2.6.1 Not vulnerable None
F5 WebSafe None 1.0.0 Not vulnerable None
Traffix SDC 4.0.0 - 4.4.0 None Low OpenSSH
3.3.2 - 3.5.1
Note: As of February 17, 2015, AskF5 Security Advisory articles include
the Severity value. Security Advisory articles published before this date
do not list a Severity value.
Recommended Action
If the previous table lists a version in the Versions known to be not
vulnerable column, you can eliminate this vulnerability by upgrading to
the listed version. If the listed version is older than the version you
are currently running, or if the table does not list any version in the
column, then no upgrade candidate currently exists.
F5 responds to vulnerabilities in accordance with the Severity values
published in the previous table. The Severity values and other security
vulnerability parameters are defined in SOL4602: Overview of the F5 security
vulnerability response policy.
BIG-IP, Enterprise Manager, and BIG-IQ
To mitigate this vulnerability, you should permit access to the system only
over a secure network and limit login access to trusted users. For more
information, refer to SOL13309: Restricting access to the Configuration
utility by source IP address (11.x) and SOL13092: Overview of securing
access to the BIG-IP system.
Traffix SDC
To mitigate this vulnerability, you should allow only the administrative
users to access Traffix SDC.
Supplemental Information
SOL9970: Subscribing to email notifications regarding F5 products
SOL9957: Creating a custom RSS feed to view new and updated documents
SOL4918: Overview of the F5 critical issue hotfix policy
SOL167: Downloading software and firmware from F5
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